Hi there,
Hope you are doing well.
With 4756 CRL rank in JEE Mains, the possible courses available to you are:-

• NIT Warangal:- ECE
• NIT Trichy:- EEE
• NIT Surathkal:- IT
• VNIT Nagpur:- CSE
• MNIT Jaipur:- CSE

According to stats of the year 2018, with 126 marks in JEE Advance your rank would be around 11,000 and you won't be able to get any branches in any of IITs with this rank
Hope it would help.
Thank You